bignum bn2vch: cast bytearray to string, to make things work
bignum bn2vch: cast bytearray to string, to make things work

jgarzik/pynode,daedalus/python-bitcoin_r,robertsdotpm/python-bitcoinlib,jgarzik/python-bitcoinlib,petertodd/tx-flood-attack,petertodd/stealth-addresses-ref-implementation,petertodd/dust-b-gone,daedalus/pynode